How I turned systems I already use into products: checking whether anyone will buy it, packaging it, and setting up a Kit store that takes payment and delivers on its own. It's the setup behind this checkout page.
• A five-check scorecard to test demand before you build
• Packaging, sanitizing and licensing what you sell
• Kit setup step by step: checkout, launch discount, upsells, delivery and the receipt email
What's inside: the guide, the Product Planner spreadsheet (scorecard, pricing math, launch checklist) and a Claude prompt pack.
Kit's free plan includes selling. Every future version is free.